CVE-2026-20614 is a vulnerability in Apple macOS caused by improper validation of file paths, classified under CWE-22, which relates to path traversal or path manipulation issues. This flaw allows an application running with limited privileges to exploit the path handling mechanism to gain root-level privileges on the system. The vulnerability affects multiple macOS versions prior to the patched releases: Sequoia 15.7.4, Tahoe 26.3, and Sonoma 14.8.4. The root cause is insufficient validation of pathname inputs, enabling an attacker to escape restricted directories and execute unauthorized actions with elevated privileges. The vulnerability does not require user interaction but does require the attacker to have local access with low privileges on the system. The CVSS v3.1 base score is 7.8, indicating a high severity due to the combination of low attack complexity, no user interaction, and the ability to fully compromise system confidentiality, integrity, and availability. Although no exploits have been reported in the wild yet, the potential for privilege escalation makes this a critical issue for macOS users. Apple has addressed this vulnerability by improving path validation in the specified macOS versions. Organizations relying on macOS should apply these updates immediately to prevent exploitation.

If exploited, this vulnerability allows an attacker with limited local access to escalate privileges to root, effectively gaining full control over the affected macOS system. This can lead to complete compromise of system confidentiality, integrity, and availability. Attackers could install persistent malware, exfiltrate sensitive data, modify system configurations, or disrupt system operations. The lack of required user interaction lowers the barrier for exploitation once local access is obtained, increasing the risk in environments where multiple users share systems or where attackers have gained initial footholds with limited privileges. The vulnerability poses a significant risk to organizations using macOS in enterprise, government, and critical infrastructure sectors, potentially enabling lateral movement and deeper network compromise. The absence of known exploits in the wild currently reduces immediate risk but does not diminish the urgency of patching due to the high impact and ease of exploitation.

1. Immediately apply the security updates provided by Apple for macOS Sequoia 15.7.4, Tahoe 26.3, and Sonoma 14.8.4 or later versions to ensure the vulnerability is patched. 2. Restrict local access to macOS systems to trusted users only, minimizing the risk of an attacker gaining initial low-privilege access. 3. Implement strict access controls and monitoring on macOS endpoints to detect unusual privilege escalation attempts or suspicious file path manipulations. 4. Employ endpoint detection and response (EDR) solutions capable of identifying anomalous behavior indicative of exploitation attempts. 5. Regularly audit user privileges and remove unnecessary local accounts or administrative rights to reduce the attack surface. 6. Educate users and administrators about the risks of local privilege escalation vulnerabilities and the importance of timely patching. 7. Consider network segmentation to limit lateral movement opportunities if a macOS system is compromised. 8. Maintain up-to-date backups and incident response plans to recover quickly in case of compromise.